Here is the full list of all 74 Kingdom Rush achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Complete the campaign in Veteran mode.
Fire the Sunray 20 times.
Defeat Moloch the Demon Overlord.
Defeat 9 legions before they replicate.
Defeat Lord Blackburn to avoid war between kingdoms.
Discover the hidden monster under water.
Capture the attention of the mysterious crow.
Kill 15 Wererats before they sicken any soldier.
Find the ninja master rat.
Defeat Myconid, the Rotten Fungus.
Kill 25 Shrooms without them poisoning your soldiers.
Sell 30 towers.
Defeat Greenmuck and its minions.
Do not let The Kingpin escape.
Defeat Ulguk-Hai the Troll Warlord.
Find the 5 legendary lost ice-shrooms.
Defeat 10 Troll Pathfinders while they're treading on ice.
Find the elusive acorn.
Defeat Sarelgaz and its minions.
Complete all iron stages.
Complete all heroic stages.
Sell 5 towers in a single mission.
Snipe 50 enemies.
Polymorph 50 enemies into sheep.
Teleport 250 or more enemies.
Disintegrate 50 or more enemies.
Have your Elves deal 10000 points of damage.
Earn 45 stars.
Drop 1.000 or more bomblets with the cluster bomb.
Kill 50 enemies by poison damage.
Have a single barbarian kill 10 enemies.
Shoot 100 missiles.
Throw 500 or more axes.
Have your Paladins perform 100 Holy Strikes.
Help Fredo escape.
Catch a fish.
Defeat Gul'Thak and its minions.
Build all 8 towers specializations.
Summon 5 rock elementals in any one stage.
Defeat Vez'nan.
Complete the campaign.
Recruit max elves at The Silveroak Outpost.
Build 4 Tesla towers in any stage.
Have your soldiers survive the explosion of 300 demons.
Kill 300 enemies with electricity.
Earn 30 stars.
Defeat J.T.
Train 1.00 soldiers.
Have your Paladins heal a total of 7.000 life.
Change soldiers' rally point 200 times.
Hold 500 or more enemies with Wrath of the Forest.
Kill 10.000 enemies.
Have your soldiers regenerate a total of 50.000 life.
Send 1.000 soldiers to their deaths.
Free the sasquatch on the Icewind Pass.
Have at least 3 Imperial Guards survive in the Citadel.
Defeat The Juggernaut
Train a hero up to max level.
Call all waves early in a single mission.
Call a wave within 3 seconds of the icon showing up.
Earn 15 stars.
Use Rain of Fire 5 times in a single stage.
Upgrade all basic tower types to level3.
Train a hero up to level 5.
Build 150 towers.
Open 5 information cards.
Kill 2.500 enemies
Kill 10 or more sheep with your hands.
Build 100 towers.
Kill 100 enemies with meteor showers.
Call 10 waves early.
Build 30 towers.
Kill 500 enemies.
Kill one enemy.